Validates commands as they are issued and returns an error
or changes options when policy is violated.

You can copy this file to any of the following
1. A .drush folder in your HOME folder.
2. Anywhere in a folder tree below an active module on your site.
3. /usr/share/drush/commands (configurable)
4. In an arbitrary folder specified with the --include option.

drush_log(dt('Per site policy, you must add a secret --token complete this command. See examples/policy.drush.inc. If you are running a version of drush prior to 4.3 and are not sure why you are seeing this message, please see http://drupal.org/node/1024824.'), 'warning');